Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> |
| 3 | * |
| 4 | * Parts came from builtin-{top,stat,record}.c, see those files for further |
| 5 | * copyright notes. |
| 6 | * |
| 7 | * Released under the GPL v2. (and only v2, not any later version) |
| 8 | */ |
Arnaldo Carvalho de Melo | a8c9ae1 | 2011-11-05 08:41:51 -0200 | [diff] [blame] | 9 | #include "util.h" |
| 10 | #include "debugfs.h" |
Arnaldo Carvalho de Melo | 5c58104 | 2011-01-11 22:30:02 -0200 | [diff] [blame] | 11 | #include <poll.h> |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 12 | #include "cpumap.h" |
| 13 | #include "thread_map.h" |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 14 | #include "evlist.h" |
| 15 | #include "evsel.h" |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 16 | |
Arnaldo Carvalho de Melo | 50d08e4 | 2011-11-04 09:10:59 -0200 | [diff] [blame] | 17 | #include "parse-events.h" |
| 18 | |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 19 | #include <sys/mman.h> |
| 20 | |
Arnaldo Carvalho de Melo | 70db753 | 2011-01-12 22:39:13 -0200 | [diff] [blame] | 21 | #include <linux/bitops.h> |
| 22 | #include <linux/hash.h> |
| 23 | |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 24 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
Arnaldo Carvalho de Melo | a91e543 | 2011-03-10 11:15:54 -0300 | [diff] [blame] | 25 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 26 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 27 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
| 28 | struct thread_map *threads) |
Arnaldo Carvalho de Melo | ef1d1af | 2011-01-18 21:41:45 -0200 | [diff] [blame] | 29 | { |
| 30 | int i; |
| 31 | |
| 32 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) |
| 33 | INIT_HLIST_HEAD(&evlist->heads[i]); |
| 34 | INIT_LIST_HEAD(&evlist->entries); |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 35 | perf_evlist__set_maps(evlist, cpus, threads); |
Arnaldo Carvalho de Melo | ef1d1af | 2011-01-18 21:41:45 -0200 | [diff] [blame] | 36 | } |
| 37 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 38 | struct perf_evlist *perf_evlist__new(struct cpu_map *cpus, |
| 39 | struct thread_map *threads) |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 40 | { |
| 41 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); |
| 42 | |
Arnaldo Carvalho de Melo | ef1d1af | 2011-01-18 21:41:45 -0200 | [diff] [blame] | 43 | if (evlist != NULL) |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 44 | perf_evlist__init(evlist, cpus, threads); |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 45 | |
| 46 | return evlist; |
| 47 | } |
| 48 | |
Arnaldo Carvalho de Melo | 0f82ebc | 2011-11-08 14:41:57 -0200 | [diff] [blame^] | 49 | void perf_evlist__config_attrs(struct perf_evlist *evlist, |
| 50 | struct perf_record_opts *opts) |
| 51 | { |
| 52 | struct perf_evsel *evsel; |
| 53 | |
| 54 | if (evlist->cpus->map[0] < 0) |
| 55 | opts->no_inherit = true; |
| 56 | |
| 57 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 58 | perf_evsel__config(evsel, opts); |
| 59 | |
| 60 | if (evlist->nr_entries > 1) |
| 61 | evsel->attr.sample_type |= PERF_SAMPLE_ID; |
| 62 | } |
| 63 | } |
| 64 | |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 65 | static void perf_evlist__purge(struct perf_evlist *evlist) |
| 66 | { |
| 67 | struct perf_evsel *pos, *n; |
| 68 | |
| 69 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { |
| 70 | list_del_init(&pos->node); |
| 71 | perf_evsel__delete(pos); |
| 72 | } |
| 73 | |
| 74 | evlist->nr_entries = 0; |
| 75 | } |
| 76 | |
Arnaldo Carvalho de Melo | ef1d1af | 2011-01-18 21:41:45 -0200 | [diff] [blame] | 77 | void perf_evlist__exit(struct perf_evlist *evlist) |
| 78 | { |
| 79 | free(evlist->mmap); |
| 80 | free(evlist->pollfd); |
| 81 | evlist->mmap = NULL; |
| 82 | evlist->pollfd = NULL; |
| 83 | } |
| 84 | |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 85 | void perf_evlist__delete(struct perf_evlist *evlist) |
| 86 | { |
| 87 | perf_evlist__purge(evlist); |
Arnaldo Carvalho de Melo | ef1d1af | 2011-01-18 21:41:45 -0200 | [diff] [blame] | 88 | perf_evlist__exit(evlist); |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 89 | free(evlist); |
| 90 | } |
| 91 | |
| 92 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
| 93 | { |
| 94 | list_add_tail(&entry->node, &evlist->entries); |
| 95 | ++evlist->nr_entries; |
| 96 | } |
| 97 | |
Arnaldo Carvalho de Melo | 50d08e4 | 2011-11-04 09:10:59 -0200 | [diff] [blame] | 98 | static void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
| 99 | struct list_head *list, |
| 100 | int nr_entries) |
| 101 | { |
| 102 | list_splice_tail(list, &evlist->entries); |
| 103 | evlist->nr_entries += nr_entries; |
| 104 | } |
| 105 | |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 106 | int perf_evlist__add_default(struct perf_evlist *evlist) |
| 107 | { |
| 108 | struct perf_event_attr attr = { |
| 109 | .type = PERF_TYPE_HARDWARE, |
| 110 | .config = PERF_COUNT_HW_CPU_CYCLES, |
| 111 | }; |
| 112 | struct perf_evsel *evsel = perf_evsel__new(&attr, 0); |
| 113 | |
| 114 | if (evsel == NULL) |
Stephane Eranian | cc2d86b | 2011-06-07 18:19:36 +0200 | [diff] [blame] | 115 | goto error; |
| 116 | |
| 117 | /* use strdup() because free(evsel) assumes name is allocated */ |
| 118 | evsel->name = strdup("cycles"); |
| 119 | if (!evsel->name) |
| 120 | goto error_free; |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 121 | |
| 122 | perf_evlist__add(evlist, evsel); |
| 123 | return 0; |
Stephane Eranian | cc2d86b | 2011-06-07 18:19:36 +0200 | [diff] [blame] | 124 | error_free: |
| 125 | perf_evsel__delete(evsel); |
| 126 | error: |
| 127 | return -ENOMEM; |
Arnaldo Carvalho de Melo | 361c99a | 2011-01-11 20:56:53 -0200 | [diff] [blame] | 128 | } |
Arnaldo Carvalho de Melo | 5c58104 | 2011-01-11 22:30:02 -0200 | [diff] [blame] | 129 | |
Arnaldo Carvalho de Melo | 50d08e4 | 2011-11-04 09:10:59 -0200 | [diff] [blame] | 130 | int perf_evlist__add_attrs(struct perf_evlist *evlist, |
| 131 | struct perf_event_attr *attrs, size_t nr_attrs) |
| 132 | { |
| 133 | struct perf_evsel *evsel, *n; |
| 134 | LIST_HEAD(head); |
| 135 | size_t i; |
| 136 | |
| 137 | for (i = 0; i < nr_attrs; i++) { |
| 138 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); |
| 139 | if (evsel == NULL) |
| 140 | goto out_delete_partial_list; |
| 141 | list_add_tail(&evsel->node, &head); |
| 142 | } |
| 143 | |
| 144 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); |
| 145 | |
| 146 | return 0; |
| 147 | |
| 148 | out_delete_partial_list: |
| 149 | list_for_each_entry_safe(evsel, n, &head, node) |
| 150 | perf_evsel__delete(evsel); |
| 151 | return -1; |
| 152 | } |
| 153 | |
Arnaldo Carvalho de Melo | a8c9ae1 | 2011-11-05 08:41:51 -0200 | [diff] [blame] | 154 | static int trace_event__id(const char *evname) |
| 155 | { |
| 156 | char *filename, *colon; |
| 157 | int err = -1, fd; |
| 158 | |
| 159 | if (asprintf(&filename, "%s/%s/id", tracing_events_path, evname) < 0) |
| 160 | return -1; |
| 161 | |
| 162 | colon = strrchr(filename, ':'); |
| 163 | if (colon != NULL) |
| 164 | *colon = '/'; |
| 165 | |
| 166 | fd = open(filename, O_RDONLY); |
| 167 | if (fd >= 0) { |
| 168 | char id[16]; |
| 169 | if (read(fd, id, sizeof(id)) > 0) |
| 170 | err = atoi(id); |
| 171 | close(fd); |
| 172 | } |
| 173 | |
| 174 | free(filename); |
| 175 | return err; |
| 176 | } |
| 177 | |
| 178 | int perf_evlist__add_tracepoints(struct perf_evlist *evlist, |
| 179 | const char *tracepoints[], |
| 180 | size_t nr_tracepoints) |
| 181 | { |
| 182 | int err; |
| 183 | size_t i; |
| 184 | struct perf_event_attr *attrs = zalloc(nr_tracepoints * sizeof(*attrs)); |
| 185 | |
| 186 | if (attrs == NULL) |
| 187 | return -1; |
| 188 | |
| 189 | for (i = 0; i < nr_tracepoints; i++) { |
| 190 | err = trace_event__id(tracepoints[i]); |
| 191 | |
| 192 | if (err < 0) |
| 193 | goto out_free_attrs; |
| 194 | |
| 195 | attrs[i].type = PERF_TYPE_TRACEPOINT; |
| 196 | attrs[i].config = err; |
| 197 | attrs[i].sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | |
| 198 | PERF_SAMPLE_CPU); |
| 199 | attrs[i].sample_period = 1; |
| 200 | } |
| 201 | |
| 202 | err = perf_evlist__add_attrs(evlist, attrs, nr_tracepoints); |
| 203 | out_free_attrs: |
| 204 | free(attrs); |
| 205 | return err; |
| 206 | } |
| 207 | |
Arnaldo Carvalho de Melo | 4152ab3 | 2011-07-25 11:06:19 -0300 | [diff] [blame] | 208 | void perf_evlist__disable(struct perf_evlist *evlist) |
| 209 | { |
| 210 | int cpu, thread; |
| 211 | struct perf_evsel *pos; |
| 212 | |
| 213 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { |
| 214 | list_for_each_entry(pos, &evlist->entries, node) { |
| 215 | for (thread = 0; thread < evlist->threads->nr; thread++) |
| 216 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_DISABLE); |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
David Ahern | 764e16a3 | 2011-08-25 10:17:55 -0600 | [diff] [blame] | 221 | void perf_evlist__enable(struct perf_evlist *evlist) |
| 222 | { |
| 223 | int cpu, thread; |
| 224 | struct perf_evsel *pos; |
| 225 | |
| 226 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { |
| 227 | list_for_each_entry(pos, &evlist->entries, node) { |
| 228 | for (thread = 0; thread < evlist->threads->nr; thread++) |
| 229 | ioctl(FD(pos, cpu, thread), PERF_EVENT_IOC_ENABLE); |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 234 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
Arnaldo Carvalho de Melo | 5c58104 | 2011-01-11 22:30:02 -0200 | [diff] [blame] | 235 | { |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 236 | int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries; |
Arnaldo Carvalho de Melo | 5c58104 | 2011-01-11 22:30:02 -0200 | [diff] [blame] | 237 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
| 238 | return evlist->pollfd != NULL ? 0 : -ENOMEM; |
| 239 | } |
Arnaldo Carvalho de Melo | 70082dd | 2011-01-12 17:03:24 -0200 | [diff] [blame] | 240 | |
| 241 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
| 242 | { |
| 243 | fcntl(fd, F_SETFL, O_NONBLOCK); |
| 244 | evlist->pollfd[evlist->nr_fds].fd = fd; |
| 245 | evlist->pollfd[evlist->nr_fds].events = POLLIN; |
| 246 | evlist->nr_fds++; |
| 247 | } |
Arnaldo Carvalho de Melo | 70db753 | 2011-01-12 22:39:13 -0200 | [diff] [blame] | 248 | |
Arnaldo Carvalho de Melo | a91e543 | 2011-03-10 11:15:54 -0300 | [diff] [blame] | 249 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
| 250 | struct perf_evsel *evsel, |
| 251 | int cpu, int thread, u64 id) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 252 | { |
Arnaldo Carvalho de Melo | 3d3b5e9 | 2011-03-04 22:29:39 -0300 | [diff] [blame] | 253 | int hash; |
| 254 | struct perf_sample_id *sid = SID(evsel, cpu, thread); |
| 255 | |
| 256 | sid->id = id; |
| 257 | sid->evsel = evsel; |
| 258 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); |
| 259 | hlist_add_head(&sid->node, &evlist->heads[hash]); |
| 260 | } |
| 261 | |
Arnaldo Carvalho de Melo | a91e543 | 2011-03-10 11:15:54 -0300 | [diff] [blame] | 262 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
| 263 | int cpu, int thread, u64 id) |
| 264 | { |
| 265 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); |
| 266 | evsel->id[evsel->ids++] = id; |
| 267 | } |
| 268 | |
| 269 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
| 270 | struct perf_evsel *evsel, |
| 271 | int cpu, int thread, int fd) |
Arnaldo Carvalho de Melo | 3d3b5e9 | 2011-03-04 22:29:39 -0300 | [diff] [blame] | 272 | { |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 273 | u64 read_data[4] = { 0, }; |
Arnaldo Carvalho de Melo | 3d3b5e9 | 2011-03-04 22:29:39 -0300 | [diff] [blame] | 274 | int id_idx = 1; /* The first entry is the counter value */ |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 275 | |
| 276 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
| 277 | read(fd, &read_data, sizeof(read_data)) == -1) |
| 278 | return -1; |
| 279 | |
| 280 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
| 281 | ++id_idx; |
| 282 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
| 283 | ++id_idx; |
| 284 | |
Arnaldo Carvalho de Melo | a91e543 | 2011-03-10 11:15:54 -0300 | [diff] [blame] | 285 | perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]); |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 286 | return 0; |
| 287 | } |
| 288 | |
Arnaldo Carvalho de Melo | 70db753 | 2011-01-12 22:39:13 -0200 | [diff] [blame] | 289 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
| 290 | { |
| 291 | struct hlist_head *head; |
| 292 | struct hlist_node *pos; |
| 293 | struct perf_sample_id *sid; |
| 294 | int hash; |
| 295 | |
| 296 | if (evlist->nr_entries == 1) |
| 297 | return list_entry(evlist->entries.next, struct perf_evsel, node); |
| 298 | |
| 299 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
| 300 | head = &evlist->heads[hash]; |
| 301 | |
| 302 | hlist_for_each_entry(sid, pos, head, node) |
| 303 | if (sid->id == id) |
| 304 | return sid->evsel; |
| 305 | return NULL; |
| 306 | } |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 307 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 308 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 309 | { |
| 310 | /* XXX Move this to perf.c, making it generally available */ |
| 311 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 312 | struct perf_mmap *md = &evlist->mmap[idx]; |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 313 | unsigned int head = perf_mmap__read_head(md); |
| 314 | unsigned int old = md->prev; |
| 315 | unsigned char *data = md->base + page_size; |
Arnaldo Carvalho de Melo | 8115d60 | 2011-01-29 14:01:45 -0200 | [diff] [blame] | 316 | union perf_event *event = NULL; |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 317 | |
Arnaldo Carvalho de Melo | 7bb4115 | 2011-01-29 09:08:13 -0200 | [diff] [blame] | 318 | if (evlist->overwrite) { |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 319 | /* |
Arnaldo Carvalho de Melo | 7bb4115 | 2011-01-29 09:08:13 -0200 | [diff] [blame] | 320 | * If we're further behind than half the buffer, there's a chance |
| 321 | * the writer will bite our tail and mess up the samples under us. |
| 322 | * |
| 323 | * If we somehow ended up ahead of the head, we got messed up. |
| 324 | * |
| 325 | * In either case, truncate and restart at head. |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 326 | */ |
Arnaldo Carvalho de Melo | 7bb4115 | 2011-01-29 09:08:13 -0200 | [diff] [blame] | 327 | int diff = head - old; |
| 328 | if (diff > md->mask / 2 || diff < 0) { |
| 329 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); |
| 330 | |
| 331 | /* |
| 332 | * head points to a known good entry, start there. |
| 333 | */ |
| 334 | old = head; |
| 335 | } |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | if (old != head) { |
| 339 | size_t size; |
| 340 | |
Arnaldo Carvalho de Melo | 8115d60 | 2011-01-29 14:01:45 -0200 | [diff] [blame] | 341 | event = (union perf_event *)&data[old & md->mask]; |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 342 | size = event->header.size; |
| 343 | |
| 344 | /* |
| 345 | * Event straddles the mmap boundary -- header should always |
| 346 | * be inside due to u64 alignment of output. |
| 347 | */ |
| 348 | if ((old & md->mask) + size != ((old + size) & md->mask)) { |
| 349 | unsigned int offset = old; |
| 350 | unsigned int len = min(sizeof(*event), size), cpy; |
| 351 | void *dst = &evlist->event_copy; |
| 352 | |
| 353 | do { |
| 354 | cpy = min(md->mask + 1 - (offset & md->mask), len); |
| 355 | memcpy(dst, &data[offset & md->mask], cpy); |
| 356 | offset += cpy; |
| 357 | dst += cpy; |
| 358 | len -= cpy; |
| 359 | } while (len); |
| 360 | |
| 361 | event = &evlist->event_copy; |
| 362 | } |
| 363 | |
| 364 | old += size; |
| 365 | } |
| 366 | |
| 367 | md->prev = old; |
Arnaldo Carvalho de Melo | 7bb4115 | 2011-01-29 09:08:13 -0200 | [diff] [blame] | 368 | |
| 369 | if (!evlist->overwrite) |
| 370 | perf_mmap__write_tail(md, old); |
| 371 | |
Arnaldo Carvalho de Melo | 04391de | 2011-01-15 10:40:59 -0200 | [diff] [blame] | 372 | return event; |
| 373 | } |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 374 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 375 | void perf_evlist__munmap(struct perf_evlist *evlist) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 376 | { |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 377 | int i; |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 378 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 379 | for (i = 0; i < evlist->nr_mmaps; i++) { |
| 380 | if (evlist->mmap[i].base != NULL) { |
| 381 | munmap(evlist->mmap[i].base, evlist->mmap_len); |
| 382 | evlist->mmap[i].base = NULL; |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 383 | } |
| 384 | } |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 385 | |
| 386 | free(evlist->mmap); |
| 387 | evlist->mmap = NULL; |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 388 | } |
| 389 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 390 | int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 391 | { |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 392 | evlist->nr_mmaps = evlist->cpus->nr; |
| 393 | if (evlist->cpus->map[0] == -1) |
| 394 | evlist->nr_mmaps = evlist->threads->nr; |
| 395 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 396 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
| 397 | } |
| 398 | |
Arnaldo Carvalho de Melo | bccdaba | 2011-06-02 10:39:43 -0300 | [diff] [blame] | 399 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 400 | int idx, int prot, int mask, int fd) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 401 | { |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 402 | evlist->mmap[idx].prev = 0; |
| 403 | evlist->mmap[idx].mask = mask; |
| 404 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 405 | MAP_SHARED, fd, 0); |
Arnaldo Carvalho de Melo | bccdaba | 2011-06-02 10:39:43 -0300 | [diff] [blame] | 406 | if (evlist->mmap[idx].base == MAP_FAILED) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 407 | return -1; |
| 408 | |
| 409 | perf_evlist__add_pollfd(evlist, fd); |
| 410 | return 0; |
| 411 | } |
| 412 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 413 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
| 414 | { |
| 415 | struct perf_evsel *evsel; |
| 416 | int cpu, thread; |
| 417 | |
| 418 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { |
| 419 | int output = -1; |
| 420 | |
| 421 | for (thread = 0; thread < evlist->threads->nr; thread++) { |
| 422 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 423 | int fd = FD(evsel, cpu, thread); |
| 424 | |
| 425 | if (output == -1) { |
| 426 | output = fd; |
Arnaldo Carvalho de Melo | bccdaba | 2011-06-02 10:39:43 -0300 | [diff] [blame] | 427 | if (__perf_evlist__mmap(evlist, cpu, |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 428 | prot, mask, output) < 0) |
| 429 | goto out_unmap; |
| 430 | } else { |
| 431 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) |
| 432 | goto out_unmap; |
| 433 | } |
| 434 | |
| 435 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
| 436 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) |
| 437 | goto out_unmap; |
| 438 | } |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | return 0; |
| 443 | |
| 444 | out_unmap: |
| 445 | for (cpu = 0; cpu < evlist->cpus->nr; cpu++) { |
| 446 | if (evlist->mmap[cpu].base != NULL) { |
| 447 | munmap(evlist->mmap[cpu].base, evlist->mmap_len); |
| 448 | evlist->mmap[cpu].base = NULL; |
| 449 | } |
| 450 | } |
| 451 | return -1; |
| 452 | } |
| 453 | |
| 454 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) |
| 455 | { |
| 456 | struct perf_evsel *evsel; |
| 457 | int thread; |
| 458 | |
| 459 | for (thread = 0; thread < evlist->threads->nr; thread++) { |
| 460 | int output = -1; |
| 461 | |
| 462 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 463 | int fd = FD(evsel, 0, thread); |
| 464 | |
| 465 | if (output == -1) { |
| 466 | output = fd; |
Arnaldo Carvalho de Melo | bccdaba | 2011-06-02 10:39:43 -0300 | [diff] [blame] | 467 | if (__perf_evlist__mmap(evlist, thread, |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 468 | prot, mask, output) < 0) |
| 469 | goto out_unmap; |
| 470 | } else { |
| 471 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) |
| 472 | goto out_unmap; |
| 473 | } |
| 474 | |
| 475 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
| 476 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) |
| 477 | goto out_unmap; |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | return 0; |
| 482 | |
| 483 | out_unmap: |
| 484 | for (thread = 0; thread < evlist->threads->nr; thread++) { |
| 485 | if (evlist->mmap[thread].base != NULL) { |
| 486 | munmap(evlist->mmap[thread].base, evlist->mmap_len); |
| 487 | evlist->mmap[thread].base = NULL; |
| 488 | } |
| 489 | } |
| 490 | return -1; |
| 491 | } |
| 492 | |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 493 | /** perf_evlist__mmap - Create per cpu maps to receive events |
| 494 | * |
| 495 | * @evlist - list of events |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 496 | * @pages - map length in pages |
| 497 | * @overwrite - overwrite older events? |
| 498 | * |
| 499 | * If overwrite is false the user needs to signal event consuption using: |
| 500 | * |
| 501 | * struct perf_mmap *m = &evlist->mmap[cpu]; |
| 502 | * unsigned int head = perf_mmap__read_head(m); |
| 503 | * |
| 504 | * perf_mmap__write_tail(m, head) |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 505 | * |
| 506 | * Using perf_evlist__read_on_cpu does this automatically. |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 507 | */ |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 508 | int perf_evlist__mmap(struct perf_evlist *evlist, int pages, bool overwrite) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 509 | { |
| 510 | unsigned int page_size = sysconf(_SC_PAGE_SIZE); |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 511 | int mask = pages * page_size - 1; |
| 512 | struct perf_evsel *evsel; |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 513 | const struct cpu_map *cpus = evlist->cpus; |
| 514 | const struct thread_map *threads = evlist->threads; |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 515 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE); |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 516 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 517 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 518 | return -ENOMEM; |
| 519 | |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 520 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 521 | return -ENOMEM; |
| 522 | |
| 523 | evlist->overwrite = overwrite; |
| 524 | evlist->mmap_len = (pages + 1) * page_size; |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 525 | |
| 526 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 527 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
Arnaldo Carvalho de Melo | a91e543 | 2011-03-10 11:15:54 -0300 | [diff] [blame] | 528 | evsel->sample_id == NULL && |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 529 | perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0) |
| 530 | return -ENOMEM; |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 531 | } |
| 532 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 533 | if (evlist->cpus->map[0] == -1) |
| 534 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 535 | |
Arnaldo Carvalho de Melo | aece948 | 2011-05-15 09:39:00 -0300 | [diff] [blame] | 536 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
Arnaldo Carvalho de Melo | f8a9530 | 2011-01-30 10:46:46 -0200 | [diff] [blame] | 537 | } |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 538 | |
| 539 | int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid, |
| 540 | pid_t target_tid, const char *cpu_list) |
| 541 | { |
| 542 | evlist->threads = thread_map__new(target_pid, target_tid); |
| 543 | |
| 544 | if (evlist->threads == NULL) |
| 545 | return -1; |
| 546 | |
Arnaldo Carvalho de Melo | b901941 | 2011-04-25 16:25:20 -0300 | [diff] [blame] | 547 | if (cpu_list == NULL && target_tid != -1) |
Arnaldo Carvalho de Melo | 7e2ed09 | 2011-01-30 11:59:43 -0200 | [diff] [blame] | 548 | evlist->cpus = cpu_map__dummy_new(); |
| 549 | else |
| 550 | evlist->cpus = cpu_map__new(cpu_list); |
| 551 | |
| 552 | if (evlist->cpus == NULL) |
| 553 | goto out_delete_threads; |
| 554 | |
| 555 | return 0; |
| 556 | |
| 557 | out_delete_threads: |
| 558 | thread_map__delete(evlist->threads); |
| 559 | return -1; |
| 560 | } |
| 561 | |
| 562 | void perf_evlist__delete_maps(struct perf_evlist *evlist) |
| 563 | { |
| 564 | cpu_map__delete(evlist->cpus); |
| 565 | thread_map__delete(evlist->threads); |
| 566 | evlist->cpus = NULL; |
| 567 | evlist->threads = NULL; |
| 568 | } |
Frederic Weisbecker | 0a10247 | 2011-02-26 04:51:54 +0100 | [diff] [blame] | 569 | |
| 570 | int perf_evlist__set_filters(struct perf_evlist *evlist) |
| 571 | { |
| 572 | const struct thread_map *threads = evlist->threads; |
| 573 | const struct cpu_map *cpus = evlist->cpus; |
| 574 | struct perf_evsel *evsel; |
| 575 | char *filter; |
| 576 | int thread; |
| 577 | int cpu; |
| 578 | int err; |
| 579 | int fd; |
| 580 | |
| 581 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 582 | filter = evsel->filter; |
| 583 | if (!filter) |
| 584 | continue; |
| 585 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
| 586 | for (thread = 0; thread < threads->nr; thread++) { |
| 587 | fd = FD(evsel, cpu, thread); |
| 588 | err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter); |
| 589 | if (err) |
| 590 | return err; |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | return 0; |
| 596 | } |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 597 | |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 598 | bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist) |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 599 | { |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 600 | struct perf_evsel *pos, *first; |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 601 | |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 602 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); |
| 603 | |
| 604 | list_for_each_entry_continue(pos, &evlist->entries, node) { |
| 605 | if (first->attr.sample_type != pos->attr.sample_type) |
| 606 | return false; |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 607 | } |
| 608 | |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 609 | return true; |
| 610 | } |
| 611 | |
| 612 | u64 perf_evlist__sample_type(const struct perf_evlist *evlist) |
| 613 | { |
| 614 | struct perf_evsel *first; |
| 615 | |
| 616 | first = list_entry(evlist->entries.next, struct perf_evsel, node); |
| 617 | return first->attr.sample_type; |
| 618 | } |
| 619 | |
| 620 | bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist) |
| 621 | { |
| 622 | struct perf_evsel *pos, *first; |
| 623 | |
| 624 | pos = first = list_entry(evlist->entries.next, struct perf_evsel, node); |
| 625 | |
| 626 | list_for_each_entry_continue(pos, &evlist->entries, node) { |
| 627 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
| 628 | return false; |
| 629 | } |
| 630 | |
| 631 | return true; |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | bool perf_evlist__sample_id_all(const struct perf_evlist *evlist) |
| 635 | { |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 636 | struct perf_evsel *first; |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 637 | |
Arnaldo Carvalho de Melo | c2a7065 | 2011-06-02 11:04:54 -0300 | [diff] [blame] | 638 | first = list_entry(evlist->entries.next, struct perf_evsel, node); |
| 639 | return first->attr.sample_id_all; |
Frederic Weisbecker | 7442996 | 2011-05-21 17:49:00 +0200 | [diff] [blame] | 640 | } |
Arnaldo Carvalho de Melo | 81cce8d | 2011-10-05 19:11:32 -0300 | [diff] [blame] | 641 | |
| 642 | void perf_evlist__set_selected(struct perf_evlist *evlist, |
| 643 | struct perf_evsel *evsel) |
| 644 | { |
| 645 | evlist->selected = evsel; |
| 646 | } |
Arnaldo Carvalho de Melo | 727ab04 | 2011-10-25 10:42:19 -0200 | [diff] [blame] | 647 | |
| 648 | int perf_evlist__open(struct perf_evlist *evlist, bool group) |
| 649 | { |
| 650 | struct perf_evsel *evsel, *first; |
| 651 | int err, ncpus, nthreads; |
| 652 | |
| 653 | first = list_entry(evlist->entries.next, struct perf_evsel, node); |
| 654 | |
| 655 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 656 | struct xyarray *group_fd = NULL; |
| 657 | |
| 658 | if (group && evsel != first) |
| 659 | group_fd = first->fd; |
| 660 | |
| 661 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads, |
| 662 | group, group_fd); |
| 663 | if (err < 0) |
| 664 | goto out_err; |
| 665 | } |
| 666 | |
| 667 | return 0; |
| 668 | out_err: |
| 669 | ncpus = evlist->cpus ? evlist->cpus->nr : 1; |
| 670 | nthreads = evlist->threads ? evlist->threads->nr : 1; |
| 671 | |
| 672 | list_for_each_entry_reverse(evsel, &evlist->entries, node) |
| 673 | perf_evsel__close(evsel, ncpus, nthreads); |
| 674 | |
| 675 | return err; |
| 676 | } |